Foraging behaviour of the Brazilian squirrel Sciurus aestuans [Rodentia, Sciuridae]

• Autorzy: Alvarenga C. A. , Talamoni S.A.
• Języki publikacji: EN

Abstrakty

EN

We describe the foraging behaviour of the Brazilian squirrelSciurus aestuans Linnaeus, 1776 in a natural free-living population, in an area with a high concentration of palm fruitsSyagrus romanzoffiana (Chamisso) Glassman. Our objective was to investigate if the abundance ofS. romanzoffiana fruits, an important food item for squirrels, temporally influenced the foraging behaviour of this population. The observations were carried out over an eight-month (April–November 2001) period. Fruiting phenology ofS. romanzoffiana was also monitored. The most consumed food item for this period was the fruit ofS. romanzoffiana (70%), followed by foods of human origin (14%). The percentage of time spent feeding increased in September, and the time spent travelling declined in September, October and November, when females were observed showing evidence of reproductive activity. At the same timeS. romanzoffiana fruits become available. The consumption of human items illustrates the opportunistic feeding habit of these squirrels, but variations in foraging behaviour detected probably were more strongly related to availability ofS. romanzoffiana fruits.

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 2006
• Tom: 51
• Numer: 1
• Opis fizyczny: p.69-74,fig.,ref.

Twórcy

autor

Alvarenga C. A.

• Universidade Catolica de Minas Gerais. Av. Dom Jose Gaspar, 500, Belo Horizonte, MG, 30535-610, Brazil

autor

Talamoni S.A.

Bibliografia

• Altmann J. 1974. Observation study of behaviour: sampling methods. Behaviour 49: 227–265.
• Alvarenga C. A. 2002. [Study of aSciurus aestuans ingrami Thomas, 1901 (Rodentia, Sciuridae) population at Serra do Caraça Private Natural Reserve, Minas Gerais, Brasil]. MSc thesis, Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte: 1–44. [In Portuguese]
• Andrén H. and Delin A. 1994. Habitat selection in the Eurasian red squirrelSciurus vulgaris in relation to forest fragmentation. Oikos 70: 43–48.
• Bordignon M. and Monteiro-Filho E. L. A. 1999. Seasonal food resources of the squirrelSciurus ingrami in a secondary Araucaria forest in southern Brazil. Studies Neotropical Fauna & Environment 34: 137–140View Article
• Bordignon M. and Monteiro-Filho E. L. A. 2000. Behaviour and daily activity of the squirrelSciurus ingrami in a secondary Araucaria Forest in southern Brazil. Canadian Journal of Zoology 78: 1732–1739.
• Galetti M., Paschoal M. and Pedroni F. 1992. Prédation on palm nuts (Syagrus romanzoffiana) by squirrels (Sciurus ingrami) in south-east Brazil. Journal of Tropical Ecology 8: 121–123.
• Gurnell J. 1996. Effects of food availability and winter weather on the dynamics of a grey squirrel population in southern England. Journal of Applied Ecology 33: 325–338.
• Koprowski J. L. 1994.Sciurus carolinensis. Mammalian Species 480: 1–9.
• Lurz P. W. W., Garson P. J. and Wauters L. A. 2000. Effects of temporal and spatial variations in food supply on the space and habitat use of red squirrels. Journal of Zoology, London 251: 167–178.
• Maia A., Serran F., Fernándes H. Q., Oliveira R. R., Oliveira R. F. and Penna T. M. 1987. [Inference faunal by remains vegetal III: Interactions of squirrel (Sciurus aestuans ingrami, Thomas 1901) with the palm “babade-boi” (Syagrus romanzoffiana) (Chamisso)]. Atas da Sociedade Botânica do Brasil 3: 89–96. [In Portuguese]
• Martin P. and Bateson P. 1986. Measuring behaviour. An introductory guide. Cambridge University Press: 1–200.
• Paschoal M. and Galetti M. 1995. Seasonal food use by the Neotropical squirrelSciurus ingrami in southeastern Brazil. Biotropica 27: 268–273.
• Rodriguez A. and Andrén H. 1999. A comparison of Eurasian red squirrel distribution in different fragmented landscapes. Journal of Applied Ecology 36: 649–669.
• Wauters L. A. and Dhondt A. A. 1989. Body weight, longevity and reproductive success in red squirrelSciurus vulgaris. Journal of Animal Ecology 58: 637–651.
• Wauters L. A. and Dhondt A.A. 1992. Spacing behaviour of red squirrelSciurus vulgaris: variation between habitats and the sexes. Animal Behaviour 43: 297–311.
• Wauters L. A., Swinnen A. A. and Dhondt A. A. 1992. Activity budget and foraging behaviour of red squirrelSciurus vulgaris in coniferous and deciduous habitats. Journal of Zoology, London 227: 71–86.
• Zar J. H. 1999. Biostatistical analysis. Fourth Edition. Prentice-Hall, Upper Saddle River, NJ, New Jersey: 1–718.